How-To Guide for Building an AR-10 So, after learning about the differences between AR-10, DPMS Gen 1, and DPMS Gen 2 in our previous article, you’ve got your .308 AR 80% lower on the way to your front door, or you’ve already machined it. Congratulations! Now that you’ve committed to an AR-10 build and you’re ready to machine that hunk of aluminum into a firearm, it’s time to actually put the weapon together. In this article, we will give you an idea of how to go about building an AR-10 with the right parts and tools. AR-10 Build Tools List...